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Check if a table exists in Rails
...came explicit regarding tables/views, collectively data sources.
# Tables and views
ActiveRecord::Base.connection.data_sources
ActiveRecord::Base.connection.data_source_exists? 'kittens'
# Tables
ActiveRecord::Base.connection.tables
ActiveRecord::Base.connection.table_exists? 'kittens'
# Views
Ac...
Escape double quote character in XML
... answered Aug 3 '09 at 13:30
Andrew HareAndrew Hare
310k6363 gold badges611611 silver badges614614 bronze badges
...
android webview geolocation
...) The default implementation does nothing, so permission is never obtained and the location is never passed to JavaScript. A simple implementation which always grants permission is ...
webView.setWebChromeClient(new WebChromeClient() {
public void onGeolocationPermissionsShowPrompt(String origin, ...
How to Replace dot (.) in a string in Java
...wo backslashes before the dot, one to escape the slash so it gets through, and the other to escape the dot so it becomes literal. Forward slashes and asterisk are treated literal.
str=xpath.replaceAll("\\.", "/*/"); //replaces a literal . with /*/
http://docs.oracle.com/javase/7/docs/ap...
How to get awaitable Thread.Sleep?
...ds.
You should instead use Task.Delay which doesn't require a new thread, and was designed precisely for this purpose:
// Execution of the async method will continue one second later, but without
// blocking.
await Task.Delay(1000);
...
What is IP address '::1'?
...
I use Windows Server 2008 Enterprise Edition 64-bit and no third-party firewall installed. I'm wondering why I cannot bind 127.0.0.1 to my socket while ::1 is available.
– Xaqron
Jan 6 '11 at 3:30
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How to check if element is visible after scrolling?
...you to call a utility function that accepts the element you're looking for and if you want the element to be fully in view or partially.
function Utils() {
}
Utils.prototype = {
constructor: Utils,
isElementInView: function (element, fullyInView) {
var pageTop = $(window).scrollTo...
what does npm -D flag mean?
I am about to install this npm package and it says npm install -D load-grunt-config , what does the -D flag do?
3 Answer...
Git error on commit after merge - fatal: cannot do a partial commit during a merge
I ran a git pull that ended in a conflict. I resolved the conflict and everything is fine now (I used mergetool also).
1...
Trying to fire the onload event on script tag
...
can you help me understand why the ordering is important?
– chovy
Apr 26 '13 at 8:19
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